Digital climate control unit not working

GPANG

MEMBER
2002 SAAB 9-3
2.0L
4 CYL
2WD
AUTOMATIC
150,000 MILES

My car listed above SE model digital climate control unit went bad. I purchased used unit and need help to reset. Now, no heat and blowing cold air at high speed.
Is the digital climate control problem? Or cabin sensor problem? Or something else?

Thanks

3 Replies

KEN L

MASTER CERTIFIED MECHANIC
48,356 POSTS

The new unit must be reprogrammed here is the instruction in the diagrams below to help you fix the issue.

Calibrate the ACC-system by simultaneously pressing the buttons "AUTO" and "OFF".

Check out the diagrams (below). Please let us know what you find. We are interested to see what it is.

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Wednesday, January 8th, 2020 AT 11:04 AM

GPANG

MEMBER
2 POSTS

Thank you for your response.
The unit will produce heat upon resetting by pressing auto and off button at the same time. The problem starts when I try to adjust the temp using the blue and red arrows.,
It produces heat for about a few minutes and then cold air starts blowing. Even upon trying to set the temperature on high using the arrow the unit will not heat. Until I reset the unit from the beginning, I have no heat. What do you think I should do?

Greatly appreciative,

Gpang

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Thursday, January 9th, 2020 AT 11:15 AM

KEN L

MASTER CERTIFIED MECHANIC
48,356 POSTS

It could be the system is working correctly, but the heater side of things is not working. can you let the car warm up then turn the heater on high then open the hood and feel both heater hoses they should be hot to the touch? This guide can help us:

https://www.2carpros.com/articles/car-heater-not-working

Please run down this guide and report back.

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Thursday, January 9th, 2020 AT 11:17 AM